Replacement Filter Twin Pack. For all Water-to-Go bottles.

Pack of two filters for all bottles

Created based on technology originally developed for NASA, this 3 in 1 filter fits all Water-to-Go water bottle and eliminates over 99.9% of all Bacteria, Viruses, Chlorine, Fluoride and Heavy Metals such as Lead leaving you with safe, healthy water.

Filter is effective for 200l roughly 3 full bottles per day for 3 months.

• Price is for a pack of two filters for all bottles

• Removes over 99.9% of metals and chemicals including
  • Chlorine, Fluoride
  • Chromium, Mercury, Nickel, Copper, Iron
  • Lead, Gold, Silver
  • Aluminium
  • Volatile Organic Compounds including Formaldehyde

• Protects you from water borne viruses including Norwalk, Hepatitis A, Tota Virus, Polio, Adenoviruses, Enteroviruses, Reoviruses

• Takes out over 99.9% of bacteria including:
  • Coliform, E.Coli, Cholera, Typhus
  • Dysentery, Botulism,
  • Vibrio Disease, Campylobacteriosis
  • Leptospirosis – Weil's Disease
  • Legionella (Legionnaires Disease and Pontiac Fever)

• Filters water borne pathogens and oocystes (protozoa) including:
  • Giardia lamblia
  • Fasciolopsiasis Taeniasis – Tapeworm
  • Echinococcosis Ascariasis
  • Coenorosis Schistosomiasis
  • Cryptosporidium Tryonosoma (Sleeping Sickness)
  • Threadworm Guinea Worm
  • Hookworm Roundworm
  • Pinworm Onchiocerca
  • Fasciola Hepatica/Liver fluke

• Water-to-Go filters are intended to remove contamination from water.

• Filters will become inefficient if used with additives such as isotonic powders, cordials, juices etc.

• Not recommended to filter urine for drinking purposes.

• Not effective on sea water

• Filters 200 litres of water (roughly one water bottle filled three times per day for 3 months)

• Effective cost is approximately 20c per litre of fresh clean drinking water

• Deactivates when dry

• One filter weighs 18g

• Biodegradable filter membrane

• Recyclable end caps

Q: How do I use the bottle?

A: Super easy. Just fill, replace the lid and drink. To drink, sip or suck water through the filter. Avoid excessive squeezing. The filter purifies water as you drink — no pumping, iodine tablets, UV light or chemicals required.

Q: What set-up is required? How do I activate the filter?

A: Before first use, fill the bottle and turn it upside down so the filter is fully submerged for at least 15 minutes. Then gently squeeze out the water until it runs clear. That's it — your bottle is ready to use. If used regularly, the filter only needs to be activated this once. If your filter dries out completely (usually after several weeks of not being used), just submerge it again for 15 minutes. You can safely reactivate the filter up to three times and get multiple trips out of a single filter.

Q: Why am I not getting much water out of the bottle?

A: If you're new to filter bottles, the flow rate feels slower than a regular water bottle. That's the filter doing its job — capturing contaminants as you draw water through it. Our bottles deliver around 15–18 ml per second, which is a good guzzle rate once you're used to it.

Q: What if I experience a leak?

A: The lid probably needs to be tightened a bit — give it a gentle extra twist. When drinking, gently suck to pull water through the filter. Don't squeeze the bottle.

Q: What contaminants does Water-to-Go filter?

A: Water-to-Go's unique 3-in-1 filter offers extreme protection from water-borne illness. In lab tests, the filter captured even the smallest of viruses like polio, which can be as small as 0.03 microns. Water-to-Go filters viruses, bacteria, parasites (including giardia, which is found in many New Zealand rivers and streams), chemicals, pesticides, heavy metals (lead, arsenic, chromium), and microplastics. Water-to-Go has been proven in independent lab tests and by explorers who trust it on extreme adventures worldwide.

Q: How does Water-to-Go filter so many contaminants?

A: The filter combines three technologies in one: (1) Mechanical filtration — an extremely small pore size (down to 0.7 microns) that physically blocks contaminants. (2) Activated carbon — embedded within the membrane (rather than glued together), which traps chemicals and removes bad tastes and odours. (3) Electropositive nanofiltration — the membrane carries a positive electrostatic charge, so contaminants not blocked by pore size or absorbed by carbon are attracted to the membrane like a magnet and trapped. No other water filter technology combines all three approaches at this price per litre.

Q: Does it filter chlorine and fluoride?

A: Yes. Recent tests show Water-to-Go filters reduce chlorine to below detectable levels. The filters also use alumina nanotechnology together with carbon to filter out fluoride. You can taste the difference — particularly noticeable in chlorinated town supply.

Q: Can the bottle go in the dishwasher?

A: The Eco Active bottles and Classic 75cl bottles are dishwasher safe:

Hand wash the lid.

The Go! 50cl bottle is not dishwasher safe. Hand wash only.

In all cases, please remove the filter before cleaning. The filter itself is not designed to be flushed or put through the dishwasher.

Q: Can I use this bottle with powders (electrolyte mixes, cordial, etc.)?

A: Powders will be captured by the filter and reduce its lifespan. If you want to use your bottle with powders, unscrew the filter from the lid and use water from a safe, drinkable source. When you need to filter water again, screw the filter back on. Having a spare filter on hand is a good idea if you switch back and forth often.

Q: How long does the filter last?

A: Filter life is determined by the volume of water that passes through it, not by time. Each filter treats around 200 litres, replaces approximately 400 single-use plastic bottles, and lasts roughly 3 months at typical use (filling the bottle 2–3 times a day). If you're filtering water with heavy silt or sediment, filter life will decrease.

Q: How do I know when the filter needs to be replaced?

A: Two ways to tell: (1) Email reminder — if you bought your bottle from watertogo.co.nz and signed up to our list, we'll email you a reminder around the three-month mark. (2) Taste and smell — the carbon component is calibrated to last around 200 litres. After that, the filter will still remove bacteria, cysts, and other microbiological contaminants, but the water will gradually return to its original taste and smell. That's your sensory cue to swap the filter. If you're travelling somewhere with particularly unsafe water, we recommend changing the filter every two months.

Q: What is the filter shelf life?

A: Three years in the original sealed packaging. The nanotechnology is activated by contact with water, so before first use, keep your filter dry and in a cool place.

Q: What is the bottle made of?

A: The Eco Active bottles are made from ethically harvested sugarcane bioplastic (except the lid and filter shroud). It's produced with around 60% less energy and 40% fewer greenhouse gases than regular plastic bottles. All Water-to-Go bottles are fully recyclable, and the filter membrane is compostable.

Q: Does the bottle come with a filter?

A: Yes — every Water-to-Go bottle comes with a filter already attached to the lid, ready to be activated.

Q: Where can I buy replacement filters?

A: Replacement filters for the New Zealand and Australian market are available directly at watertogo.co.nz. Buying locally means faster shipping and no overseas duty.

Q: Can it filter salt water?

A: No. Fresh water only. Water-to-Go does not desalinate.

Q: Can the filter be frozen?

A: No — the filter will not work effectively if it freezes, because freezing damages the membrane. If your filter does freeze, fully defrost it by filling the bottle with lukewarm (not hot) water before using it again. You can still fill the bottle with snow or ice in cold climates, but keep the filter itself protected — in a bag, sleeping bag, or close to your body — so it doesn't freeze.

Q: Do you have testing reports?

A: Yes. You can view our test results on our testing page. Water-to-Go has been independently tested on three continents by internationally renowned laboratories in London, Florida, Bangalore and China.